8243390049 has 32 divisors (see below), whose sum is σ = 12186236160. Its totient is φ = 4947236096.

The previous prime is 8243390047. The next prime is 8243390059. The reversal of 8243390049 is 9400933428.

It is a happy number.

It is not a de Polignac number, because 8243390049 - 2¹ = 8243390047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8243390047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326839 + ... + 351155.

It is an arithmetic number, because the mean of its divisors is an integer number (380819880).

Almost surely, 2^8243390049 is an apocalyptic number.

It is an amenable number.

8243390049 is a deficient number, since it is larger than the sum of its proper divisors (3942846111).

8243390049 is a wasteful number, since it uses less digits than its factorization.

8243390049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24394 (or 24360 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 8243390049 is about 90793.1167490135. The cubic root of 8243390049 is about 2020.0802217103.

The spelling of 8243390049 in words is "eight billion, two hundred forty-three million, three hundred ninety thousand, forty-nine".